Update dependency phpunit/phpunit to v12

Author: renovate[bot]

composer.json

@@ -33,7 +33,7 @@
   "require-dev": {
     "php-di/php-di": "^7.0",
     "phpstan/phpstan": "^2.1",
-    "phpunit/phpunit": "^10.5",
+    "phpunit/phpunit": "^12.0",
     "squizlabs/php_codesniffer": "^3.11",
     "sunrise/http-message": "^3.4",
     "vimeo/psalm": "^6.5"